WO2015168049A1 - Structures fibreuses non tissées comprenant un matériau de renforcement ionique, et procédés - Google Patents

Structures fibreuses non tissées comprenant un matériau de renforcement ionique, et procédés Download PDF

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Publication number
WO2015168049A1
WO2015168049A1 PCT/US2015/027869 US2015027869W WO2015168049A1 WO 2015168049 A1 WO2015168049 A1 WO 2015168049A1 US 2015027869 W US2015027869 W US 2015027869W WO 2015168049 A1 WO2015168049 A1 WO 2015168049A1
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Prior art keywords
fibers
nonwoven fibrous
fibrous structure
population
ionic liquid
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PCT/US2015/027869
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English (en)
Inventor
Saibh Morrissey
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3M Innovative Properties Company
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Publication date
Application filed by 3M Innovative Properties Company filed Critical 3M Innovative Properties Company
Priority to EP15785829.1A priority Critical patent/EP3137667A4/fr
Priority to CN201580021758.6A priority patent/CN106460271A/zh
Priority to US15/304,117 priority patent/US20170037564A1/en
Priority to KR1020167032845A priority patent/KR20160146958A/ko
Priority to JP2016564574A priority patent/JP2017514035A/ja
Publication of WO2015168049A1 publication Critical patent/WO2015168049A1/fr

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/01—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with hydrogen, water or heavy water; with hydrides of metals or complexes thereof; with boranes, diboranes, silanes, disilanes, phosphines, diphosphines, stibines, distibines, arsines, or diarsines or complexes thereof
    • D06M11/05—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with hydrogen, water or heavy water; with hydrides of metals or complexes thereof; with boranes, diboranes, silanes, disilanes, phosphines, diphosphines, stibines, distibines, arsines, or diarsines or complexes thereof with water, e.g. steam; with heavy water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
    • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0266—Types of fibres, filaments or particles, self-supporting or supported materials comprising biodegradable or bio-soluble polymers

Definitions

  • the present disclosure relates to nonwoven fibrous structures and related media with ionic reinforcement material and methods of forming the same.
  • Nonwoven fibrous webs have been used to produce a variety of absorbent articles that are useful, for example, as absorbent wipes for surface cleaning, as wound dressings, as gas and liquid absorbent or filtration media, and as barrier materials for sound absorption.
  • nonwoven fibrous webs Although some methods of forming nonwoven fibrous webs are known, the art continually seeks new methods of forming and/or bonding nonwoven webs, particularly air-laid nonwoven fibrous webs having particular characteristics with a relatively high cross direction (CD) tensile strength and a relatively high machine direction (MD) tensile strength.
  • CD cross direction
  • MD machine direction
  • the present disclosure relates to a method of making a nonwoven fibrous structure (e.g., a nonwoven fibrous web), including: introducing a plurality of fibers into a forming chamber, dispersing the fibers within the forming chamber to form a population of individual fibers suspended in a gas, collecting the population of fibers as a nonwoven fibrous structure on a collector, and bonding at least a portion of the population of fibers together with an ionic reinforcement material.
  • the method comprises applying an ionic liquid material to the population of fibers.
  • the method includes bonding at least the portion of the population of fibers together comprises curing the applied ionic liquid material to form the ionic reinforcement material.
  • the applied ionic liquid material further comprises water, and where curing removes at least a portion of the water from the applied ionic liquid material to cause bonding of the ionic reinforcement material between the population of fibers.
  • the applied ionic liquid material further comprises at least one binder resin, optionally wherein the applied ionic liquid material acts as a plasticizer for the at least one binder resin.
  • the at least one binder resin is selected from the group consisting of a phenolic resin, a bio-based resin, a thermoplastic (meth)acrylic (co)polymer resin, an epoxy resin, or a combination thereof.
  • the method includes bonding with a binder resin mixture and the ionic liquid material to provide a nonwoven fibrous structure with a tensile strength that is greater than a nonwoven fibrous structure bonded with the binder resin mixture in the absence of the ionic liquid material.
  • the ionic liquid material comprises at least one cation and at least one anion.
  • the at least one cation is selected from the group consisting of nitrogen containing heterocyclic cations, ammonium, phosphonium, or sulfonium; and further wherein the at least one anion is selected from the group consisting of halogen anions, fluorine containing anions, alkyl sulfate anions, alkyl phosphate anions, acetate, dicyanamide (N(CN) 2 ), or thiocyanate (SCN).
  • the method includes spraying the ionic liquid material, roll coating the ionic liquid material, dip coating the ionic liquid material, or a combination thereof.
  • the ionic liquid material is an ionic liquid solution in a solvent, optionally wherein the solvent is aqueous.
  • bonding at least the portion of the population of fibers together includes applying a thermosetting binder to the population fibers. In certain exemplary embodiments, bonding at least the portion of the population of fibers includes heating the portion of the population of fibers.
  • the ionic reinforcement material provides at least one distinguishing characteristic to the nonwoven fibrous structure selected from the group consisting of a fire retardant characteristic, an antistatic characteristic, an antibacterial characteristic, an antimicrobial characteristic, an antifungal characteristic, or a combination thereof.
  • the population of fibers includes fibers selected from the group consisting of staple fibers, melt blown fibers, natural fibers, bio-based fibers, or a combination thereof.
  • the nonwoven fibrous structure includes a population of particulates bonded to the nonwoven fibrous structure, further wherein the particulates are selected from the group consisting of abrasive particulates, detergent particulates, anti-bacterial particulates, adsorbent particulates, absorbent particulates, or a combination thereof.
  • the nonwoven fibrous structure is a structure selected from the group consisting of a mat, a web, a sheet, a scrim, or a combination thereof.
  • the disclosure also relates to a nonwoven fibrous web prepared according to the method described herein.
  • the disclosure relates to a nonwoven fibrous structure comprising a population of randomly oriented fibers bonded together at a plurality of intersection points with an ionic reinforcement material.
  • the ionic reinforcement material is comprised of an ionic plasticizer (e.g., ionic liquid acting as a plasticizer).
  • the ionic reinforcement material is comprised of an ionic liquid and a binder selected from the group consisting of a (meth)acrylic (co)polymer binder, a styrene-butadiene latex binder, a bio-based binder, or a combination thereof.
  • the nonwoven fibrous structure comprises from 1 to 40 wt.% of the ionic liquid.
  • the ionic liquid comprises water, one or more cations, and one or more anions.
  • the nonwoven fibrous structure exhibits at least one distinguishing characteristic selected from the group consisting of a fire retardant characteristic, an antistatic characteristic, an antibacterial characteristic, an antimicrobial characteristic, an antifungal characteristic, or a combination thereof.
  • the ionic reinforcement material provides the at least one distinguishing characteristic.
  • the ionic reinforcement material provides at least two of the distinguishing characteristics.
  • the population of fibers includes thermoplastic (co)polymer fibers further comprising a (co)polymer selected from poly(propylene), poly(ethylene), poly(butane), poly(ethylene) terephthalate, poly(butylene) terephthalate, poly(ethylene) napthalate, poly(amide), poly(urethane), poly(lactic acid), poly(vinyl)alcohol, poly(phenylene) sulfide, poly(sulfone), liquid crystalline polymer, poly(ethylene)-co-poly(vinyl)acetate, poly(acrylonitrile), cyclic poly(olefin), poly(oxymethylene), poly(olefmic) thermoplastic elastomers, recycled fibers containing any of the preceding thermoplastic (co)polymers, or a combination thereof.
  • a (co)polymer selected from poly(propylene), poly(ethylene), poly(butane), poly(ethylene) terephthalate, poly(butylene) terephthalate
  • the population of fibers includes natural fibers selected from cotton, wool, jute, agave, sisal, coconut, soybean, hemp, viscose, bamboo, or a combination thereof.
  • the nonwoven fibrous structure includes a population of particulates bonded to the nonwoven fibrous structure, further wherein the particulates are selected from the group consisting of abrasive particulates, detergent particulates, anti-bacterial particulates, adsorbent particulates, absorbent particulates; or a combination thereof.
  • the population of particulates exhibits a median particle diameter of from 0.1 micrometer to 1,000 micrometers.
  • the population of fibers exhibits a median fiber diameter of from 1 micrometer to 50 micrometers.
  • the nonwoven fibrous structure is a structure selected from the group consisting of a mat, a web, a sheet, a scrim, or a combination thereof.
  • a method of making a nonwoven fibrous structure comprising:
  • population of fibers together comprises curing the applied ionic liquid material to form the ionic reinforcement material.
  • the applied ionic liquid material further comprises at least one binder resin, optionally wherein the applied ionic liquid material acts as a plasticizer for the at least one binder resin.
  • the at least one binder resin is selected from the group consisting of a phenolic resin, a bio-based resin, a thermoplastic (meth)acrylic (co)polymer resin, an epoxy resin, or a combination thereof.
  • bonding includes bonding with a binder resin mixture and the ionic liquid material to provide a nonwoven fibrous structure with a tensile strength that is greater than a nonwoven fibrous structure bonded with the binder resin mixture in the absence of the ionic liquid material.
  • any one of embodiments B-H wherein the at least one cation is selected from the group consisting of nitrogen containing heterocyclic cations, ammonium, phosphonium, or sulfonium; and further wherein the at least one anion is selected from the group consisting of halogen anions, fluorine containing anions, alkyl sulfate anions, alkyl phosphate anions, acetate, dicyanamide (N(CN) 2 ), or thiocyanate (SCN).
  • the at least one cation is selected from the group consisting of nitrogen containing heterocyclic cations, ammonium, phosphonium, or sulfonium
  • the at least one anion is selected from the group consisting of halogen anions, fluorine containing anions, alkyl sulfate anions, alkyl phosphate anions, acetate, dicyanamide (N(CN) 2 ), or thiocyanate (SCN).
  • any one of embodiments B-I, wherein applying the ionic liquid material consists of spraying the ionic liquid material, roll coating the ionic liquid material, dip coating the ionic liquid material, or a combination thereof.
  • ionic liquid material is an ionic liquid solution in a solvent, optionally wherein the solvent is aqueous.
  • thermosetting binder to the population fibers.
  • the method of any one of embodiments A-L, wherein bonding at least the portion of the population of fibers includes heating the portion of the population of fibers.
  • the population of fibers includes fibers selected from the group consisting of mono-component fibers, multi-component fibers, crimped fibers, or a combination thereof.
  • the population of fibers includes fibers selected from the group consisting of staple fibers, melt blown fibers, natural fibers, bio-based fibers, or a combination thereof.
  • the nonwoven fibrous structure includes a population of particulates bonded to the nonwoven fibrous structure, further wherein the particulates are selected from the group consisting of abrasive particulates, detergent particulates, anti-bacterial particulates, adsorbent particulates, absorbent particulates, or a combination thereof.
  • nonwoven fibrous structure is a structure selected from the group consisting of a mat, a web, a sheet, a scrim, or a combination thereof.
  • a nonwoven fibrous structure prepared according to the method of any one of embodiments A-R.
  • a nonwoven fibrous structure comprising:
  • a a population of randomly oriented fibers bonded together at a plurality of intersection points with an ionic reinforcement material.
  • the ionic reinforcement material is comprised of an ionic liquid and a binder selected from the group consisting of a (meth)acrylic (co)polymer binder, a styrene-butadiene latex binder, a bio-based binder, or a combination thereof.
  • the nonwoven fibrous structure of embodiment V comprising from 1 to 40 wt.% of the ionic liquid.
  • X The nonwoven fibrous structure of any one of embodiments V-W, wherein the ionic liquid comprises water, one or more cations, and one or more anions.
  • nonwoven fibrous structure of any one of embodiments T-X exhibiting at least one distinguishing characteristic selected from the group consisting of a fire retardant characteristic, an antistatic characteristic, an antibacterial characteristic, an antimicrobial characteristic, an antifungal characteristic, or a combination thereof.
  • population of fibers includes fibers selected from the group consisting of mono- component fibers, multi-component fibers, crimped fibers, or a combination thereof.
  • thermoplastic (co)polymer fibers further comprising a (co)polymer selected from poly(propylene), poly(ethylene), poly(butane), poly(ethylene) terephthalate, poly(butylene) terephthalate, poly(ethylene) napthalate, poly(amide), poly(urethane), poly(lactic acid), poly(vinyl)alcohol, poly(phenylene) sulfide, poly(sulfone), liquid crystalline polymer, poly(ethylene)- co-poly(vinyl)acetate, poly(acrylonitrile), cyclic poly(olefm), poly(oxymethylene), poly(olefinic) thermoplastic elastomers, recycled fibers containing any of the preceding thermoplastic (co)polymers, or a combination thereof.
  • a (co)polymer selected from poly(propylene), poly(ethylene), poly(butane), poly(ethylene) terephthalate, poly(butylene) terephthalate, poly(ethylene) nap
  • DD The nonwoven fibrous structure of any one of embodiments T-CC, wherein the population of fibers includes natural fibers selected from cotton, wool, jute, agave, sisal, coconut, soybean, hemp, viscose, bamboo, or a combination thereof.
  • nonwoven fibrous structure of any one of embodiments T-DD wherein the nonwoven fibrous structure includes a population of particulates bonded to the nonwoven fibrous structure, further wherein the particulates are selected from the group consisting of abrasive particulates, detergent particulates, anti-bacterial particulates, adsorbent particulates, absorbent particulates; or a combination thereof.
  • FF The nonwoven fibrous structure of any one of embodiments T-EE, wherein the population of particulates exhibits a median particle diameter of from 0.1 micrometer to 1,000 micrometers.
  • GG The nonwoven fibrous structure of any one of embodiments T-FF, wherein the population of fibers exhibits a median fiber diameter of from 1 micrometer to 50 micrometers.
  • nonwoven fibrous structure of any one of embodiments T-GG wherein the nonwoven fibrous structure is a structure selected from the group consisting of a mat, a web, a sheet, a scrim, or a combination thereof.
  • Figure 1 is a perspective view of an exemplary nonwoven fibrous structure of the present disclosure.
  • Figure 2 is an exploded view of a portion of the exemplary nonwoven fibrous structure of Figure 1, illustrating one exemplary embodiment of the present disclosure.
  • Nonwoven fibrous web or “nonwoven fibrous structure” means an article or sheet having a structure of individual fibers or fibers, which are interlaid, but not in an identifiable manner as in a knitted fabric.
  • Nonwoven fabrics or webs have been formed from many processes such as for example, meltblowing processes, air-laying processes, and bonded carded web processes.
  • Die means a processing assembly for use in polymer melt processing and fiber extrusion processes, including but not limited to meltblowing and spun-bonding.
  • Meltblowing and meltblown process means a method for forming a nonwoven fibrous web by extruding a molten fiber-forming material through a plurality of orifices in a die to form fibers while contacting the fibers with air or other attenuating fluid to attenuate the fibers into fibers, and thereafter collecting the attenuated fibers.
  • An exemplary meltblowing process is taught in, for example, U.S. Patent No. 6,607,624 (Berrigan et al.).
  • “Meltblown fibers” means fibers prepared by a meltblowing or meltblown process.
  • "Spun-bonding” and “spun bond process” mean a method for forming a nonwoven fibrous structure by extruding molten fiber-forming material as continuous or semi- continuous fibers from a plurality of fine capillaries of a spinneret, and thereafter collecting the attenuated fibers.
  • An exemplary spun-bonding process is disclosed in, for example, U.S. Patent No. 3,802,817 to Matsuki et al.
  • spun bond fibers and “spun-bonded fibers” mean fibers made using spun- bonding or a spun bond process. Such fibers are generally continuous fibers and are entangled or point bonded sufficiently to form a cohesive nonwoven fibrous web such that it is usually not possible to remove one complete spun bond fiber from a mass of such fibers.
  • the fibers may also have shapes such as those described, for example, in U.S. Patent No. 5,277,976 to Hogle et al, which describes fibers with unconventional shapes.
  • Carding and “carding process” mean a method of forming a nonwoven fibrous web webs by processing staple fibers through a combing or carding unit, which separates or breaks apart and aligns the staple fibers in the machine direction to form a generally machine direction oriented fibrous nonwoven web.
  • An exemplary carding process is taught in, for example, U.S. Patent No. 5,114,787 to Chaplin et al.
  • “Bonded carded web” refers to nonwoven fibrous web formed by a carding process wherein at least a portion of the fibers are bonded together by methods that include for example, thermal point bonding, autogenous bonding, hot air bonding, ultrasonic bonding, needle punching, calendering, application of a spray adhesive, and the like.
  • Coding means a process of passing a nonwoven fibrous web through rollers with application of pressure to obtain a compressed and bonded fibrous nonwoven web.
  • the rollers may optionally be heated.
  • Densification means a process whereby fibers which have been deposited either directly or indirectly onto a filter winding arbor or mandrel are compressed, either before or after the deposition, and made to form an area, generally or locally, of lower porosity, whether by design or as an artifact of some process of handling the forming or formed filter. Densification also includes the process of calendering webs.
  • Non-hollow with particular reference to projections extending from a major surface of a nonwoven fibrous structure means that the projections do not contain an internal cavity or void region other than the microscopic voids (i.e. void volume) between randomly oriented discrete fibers.
  • Randomly oriented with particular reference to a population of fibers means that the fiber bodies are not substantially aligned in a single direction.
  • Air-laying is a process by which a nonwoven fibrous web layer can be formed.
  • bundles of small fibers having typical lengths ranging from about 3 to about 52 millimeters (mm) are separated and entrained in an air supply and then deposited onto a forming screen, usually with the assistance of a vacuum supply.
  • the randomly oriented fibers may then be bonded to one another using, for example, thermal point bonding, autogenous bonding, hot air bonding, needle punching, calendering, a spray adhesive, and the like.
  • An exemplary air-laying process is taught in, for example, U.S. Patent No. 4,640,810 to Laursen et al.
  • Porate loading or a “particle loading process” means a process in which particulates are added to a fiber stream or web while it is forming.
  • Exemplary particulate loading processes are taught in, for example, U.S. Patent Nos. 4,818,464 to Lau and 4,100,324 to Anderson et al.
  • a particulate or particle means a small distinct piece or individual part of a material in finely divided form.
  • a particulate may also include a collection of individual particles associated or clustered together in finely divided form.
  • individual particulates used in certain exemplary embodiments of the present disclosure may clump, physically intermesh, electro-statically associate, or otherwise associate to form particulates.
  • particulates in the form of agglomerates of individual particulates may be intentionally formed such as those described in U.S. Patent No. 5,332,426 (Tang et al).
  • Layer means a single stratum formed between two major surfaces.
  • a layer may exist internally within a single web, e.g., a single stratum formed with multiple strata in a single web having first and second major surfaces defining the thickness of the web.
  • a layer may also exist in a composite article comprising multiple webs, e.g., a single stratum in a first web having first and second major surfaces defining the thickness of the web, when that web is overlaid or underlaid by a second web having first and second major surfaces defining the thickness of the second web, in which case each of the first and second webs forms at least one layer.
  • layers may simultaneously exist within a single web and between that web and one or more other webs, each web forming a layer.
  • Porate density gradient means that the amount of particulate, sorbent or fibrous material within a particular fiber population (e.g., the number, weight or volume of a given material per unit volume over a defined area of the web) need not be uniform throughout the nonwoven fibrous web, and that it can vary to provide more material in certain areas of the web and less in other areas.
  • Nonwoven fibrous structures e.g., nonwoven fibrous webs, etc.
  • applications e.g., uses
  • Nonwoven fibrous structures can be better suited to particular applications when the nonwoven fibrous structure exhibits particular
  • the present disclosure describes nonwoven fibrous structures that include a portion of a population of fibers that are bonded together with an ionic reinforcement material and methods of making the same.
  • the ionic reinforcement material provides an increase in the tensile strength of the nonwoven fibrous structure as well as provides a number of characteristics.
  • the ionic reinforcement material provides a plurality of characteristics as described herein.
  • the ionic reinforcement material can be applied to the nonwoven fibrous structure utilizing an application of an ionic liquid material.
  • the ionic liquid material can include an ionic liquid (e.g., liquid comprising at least one cation and at least one anion).
  • the ionic liquid material applied to the nonwoven fibrous structure can be cured to bind a portion of the population of fibers of the nonwoven fibrous structure with an ionic reinforcement material.
  • Figure 1 is a perspective view of one exemplary embodiment of a nonwoven fibrous structure 234 (e.g., air-laid nonwoven fibrous web, melt-spun nonwoven fibrous web, carded nonwoven fibrous web, etc.) comprising a plurality of randomly oriented fibers according to the present disclosure.
  • the nonwoven fibrous structure is a structure selected from the group consisting of a mat, a web, a sheet, a scrim, or a combination thereof.
  • the present disclosure describes a nonwoven fibrous structure comprising a plurality of randomly oriented fibers 2, the nonwoven fibrous structure further comprising a plurality of optional non-hollow projections 200 extending from a major surface 204 of the nonwoven fibrous structure (as considered without the projections), and a plurality of substantially planar land areas 202 formed between each adjoining projection 200 in a plane defined by and substantially parallel with the major surface 204.
  • the randomly oriented discrete fibers 2 can include fibers 120 selected from the group consisting of mono-component fibers, multi- component fibers, crimped fibers, or a combination thereof.
  • the randomly oriented discrete fibers 2 can include fibers selected from the group consisting of staple fibers, melt blown fibers, natural fibers, or a combination thereof.
  • the randomly oriented discrete fibers 2 can include natural fibers selected from cotton, wool, jute, agave, sisal, coconut, soybean, hemp, viscose, bamboo, or a combination thereof.
  • the randomly oriented discrete fibers 2 can include fibers that exhibit a median fiber diameter of from 1 micrometer to 50 micrometers.
  • the randomly oriented discrete fibers 2 can include thermoplastic (co)polymer fibers further comprising a (co)polymer selected from poly(propylene), poly(ethylene), poly(butane), poly(ethylene) terephthalate,
  • poly(butylene) terephthalate poly (ethylene) napthalate, poly(amide), poly(urethane), poly(lactic acid), poly(vinyl)alcohol, poly(phenylene) sulfide, poly(sulfone), liquid crystalline polymer, poly(ethylene)-co-poly(vinyl)acetate, poly(acrylonitrile), cyclic poly(olefm), poly(oxymethylene), poly(olefmic) thermoplastic elastomers, recycled fibers containing any of the preceding thermoplastic (co)polymers, or a combination thereof.
  • the randomly oriented discrete fibers 2 may, in some exemplary embodiments, optionally include filling fibers 110.
  • the filling fibers 1 10 are any fiber other than a multi-component fiber.
  • the optional filling fibers 110 are preferably mono-component fibers, which may be thermoplastic or "melty" fibers.
  • the filling fibers can include bio-based fibers.
  • Bio-based fibers can include natural fibers and/or biodegradable fibers.
  • the optional filling fibers 110 may, in some exemplary embodiments, comprise natural fibers, more preferably natural fibers derived from renewable sources, and/or incorporating recycled materials.
  • Non-limiting examples of suitable natural fibers include those of bamboo, cotton, wool, jute, agave, sisal, coconut, sawgrass, soybean, hemp, and the like.
  • Cellulosic fibers e.g., cellulose, cellulose acetate, cellulose triacetate, rayon, and the like
  • the fiber component used may be virgin fibers or recycled waste fibers, for example, recycled fibers reclaimed from garment cuttings, carpet manufacturing, fiber manufacturing, textile processing, paper, reclaimed wood, or the like.
  • the optional filling fibers 110 are biodegradable fibers.
  • the biodegradable fibers can include, but are not limited to fibers comprising a substantial amount of aliphatic polyester (co)polymer derived from poly(lactic acid), poly (glycolic acid), poly (lactic-co- glycolic acid) blends, and/or a combination thereof.
  • at least some of the filling fibers 120 may be bonded to at least a portion of the discrete fibers 2 at a plurality of intersection points with the first region 112 of the multi-component fibers 110.
  • the nonwoven fibrous structure 234 may optionally include a plurality of particulates 130 as shown in Figure 2.
  • Figure 2 illustrates an exploded view of region 2 of the nonwoven fibrous structure 234 of Figure 1 , shown comprising randomly oriented discrete fibers 2 and a plurality of optional particulates 130.
  • the optional particulates 130 can be particulates selected from the group consisting of abrasive particulates, detergent particulates, antibacterial particulates, adsorbent particulates, absorbent particulates, or a combination thereof.
  • the optional population of particulates 130 can exhibit a median particle diameter of from 0.1 micrometer to 1,000 micrometers.
  • the optional particulates 130 can be applied at various stages of the forming process for the nonwoven fibrous structure 234. In one example, the optional particulates can be applied by a particulate loading process. Exemplary particulate loading processes are taught in, for example, U.S. Patent Nos. 4,818,464 and 4,100,324.
  • an input stream may advantageously be located to introduce particulates 130 in a manner such that the particulates 130 are distributed substantially uniformly throughout the nonwoven fibrous structure 234.
  • an input stream may advantageously be located to introduce particulates 130 in a manner such that the particulates 130 are distributed substantially at a major surface of the nonwoven fibrous structure 234, for example, proximate a lower major surface of nonwoven fibrous structure 234, or proximate the upper major surface of the nonwoven fibrous structure 234.
  • a binder can be applied to the nonwoven fibrous structure 234 and may provide further strength to the nonwoven fibrous structure 234, may further secure the particulates 130 to the fibers of the nonwoven fibrous structure 234, and/or may provide additional stiffness for an abrasive or scouring article.
  • the binder coating may be applied by known processing means such as roll coating, spray coating, and immersion coating and combinations of these coating techniques.
  • the binder coating may include additional particulates 130 within the binder or additional particulates 130 may be incorporated and secured to the binder.
  • an ionic liquid material (e.g., ionic liquid mixture) can be coated on the nonwoven fibrous structure 234.
  • the ionic liquid material can include an ionic liquid (e.g., liquid that comprises at least one cation and at least one anion, aqueous solution that comprises at least one cation and at least one anion). That is, the ionic liquid material is an ionic liquid solution in a solvent, optionally the solvent is aqueous.
  • the ionic liquid can include at least one cation that is selected from the group containing heterocyclic cations, ammonium, phosphonium, or sulfonium.
  • the ionic liquid can include at least one anion that is selected from the group consisting of halogen anions, fluorine containing anions, alkyl sulfate anions, alkyl phosphate anions, acetate, dicyanamide (N(CN) 2 ), or thiocyanate (SCN).
  • the ionic liquid can be comprised of a salt dissolved in a liquid.
  • the ionic liquid material can comprise a salt dissolved in water to produce an ionic liquid that comprises at least one cation and at least one anion in an aqueous solution.
  • the ionic liquid material can comprise a salt dissolved in water to produce an ionic liquid that comprises at least one cation and at least one anion in an aqueous solution.
  • the ionic liquid can include at least one of the ionic liquids from the group of: sodium chloride (NaCl), choline dihydrogen phosphate, l-ethyl-3-methylimidazolium ethyl phosphate, l-ethyl-3-methylimidazolium ethyl sulfate, l-ethyl-3-methylimidazo um acetate, l-ethyl-3-methylimidazolium triflate, or l-ethyl-3-methylimidazolium dicyanamide.
  • the ionic liquid material may be applied by known processing means such as roll coating, spray coating, and immersion coating and combinations of these coating techniques.
  • the ionic liquid material is introduced as a mist from an atomizer within a forming chamber.
  • the ionic liquid material wets the fibers so that particulates cling to the surface of the fibers.
  • the ionic liquid material can also include a binder.
  • the binder may comprise a resin. Suitable resins include phenolic resins, a bio- based resin, a thermoplastic (meth)acrylic (co)polymer resin, an epoxy resin, polyurethane resins, polyureas, styrene-butadiene rubbers, nitrile rubbers, epoxies, acrylics, and polyisoprene.
  • the binder may be water soluble.
  • water soluble binders examples include surfactants, polyethylene glycol, polyvinylpyrrolidones, polylactic acid (PLA), polyvinylpyrrolidone/vinyl acetate copolymers, polyvinyl alcohols, carboxymethyl celluloses, hydroxypropyl cellulose starches, polyethylene oxides, polyacrylamides, polyacrylic acids, cellulose ether polymers, polyethyl oxazolines, esters of polyethylene oxide, esters of polyethylene oxide and polypropylene oxide copolymers, urethanes of polyethylene oxide, and urethanes of polyethylene oxide and polypropylene oxide copolymers.
  • surfactants polyethylene glycol, polyvinylpyrrolidones, polylactic acid (PLA), polyvinylpyrrolidone/vinyl acetate copolymers, polyvinyl alcohols, carboxymethyl celluloses, hydroxypropyl cellulose starches, polyethylene oxides, polyacrylamides, polyacrylic
  • the ionic liquid material can include from 1 to 40 weight percent (wt.%) of an ionic liquid and a binder in a liquid mixture (e.g., liquid solution, aqueous solution, etc.).
  • the ionic liquid material can include from 1 to 10 wt.% of an ionic liquid and a binder in a liquid mixture. That is, the ionic liquid material can include a particular weight percent of ionic liquid, a binder as described herein, and/or a percentage of water.
  • the ionic liquid material can include the ionic liquid and the binder as a mixture and/or solution and applied by known processing means such as roll coating, spray coating, and immersion coating and combinations of these coating techniques.
  • the ionic liquid can act as a plasticizer for the binder in the ionic liquid material. That is, the ionic liquid can increase the elongation (e.g., plasticity, fluidity) of the resulting nonwoven fibrous structure 234.
  • an increase in elongation of the nonwoven fibrous structure 234 occurs in the machine direction (MD).
  • the increase in elongation of the nonwoven fibrous structure 234 occurs in the transverse direction (TD).
  • the increase in elongation of the air laid nonwoven fibrous structure occurs in both the machine direction (MD) and the transverse direction (TD).
  • the ionic liquid material is comprised of an ionic liquid and a binder selected from the group consisting of a (meth)acrylic
  • thermosetting binder a binder that is relatively brittle when cured (e.g., heat is applied to the binder, etc.).
  • the addition of the ionic liquid choline dihydrogen phosphate has a plasticizing effect (e.g., acts as a plasticizer) on the thermosetting binder. That is, the nonwoven fibrous structure 234 is less brittle with the addition of the ionic liquid choline dihydrogen phosphate and thermosetting binder compared to a nonwoven fibrous structure with the addition of the thermosetting binder and no ionic liquid.
  • a plasticizing effect e.g., acts as a plasticizer
  • a number of devices can be utilized to remove excess liquid (e.g., water) from the nonwoven fibrous structure 234.
  • calendering can be utilized to remove liquid from the nonwoven fibrous structure 234.
  • Calendering can include a process of passing a nonwoven fibrous web through rollers with application of pressure to obtain a compressed and bonded fibrous nonwoven web.
  • the number of devices can include a number of squeegees that can compress the nonwoven fibrous structure 234 and remove a portion of the liquid (e.g., water) that is applied to the nonwoven fibrous structure 234.
  • the number of squeegees can be utilized before the nonwoven fibrous structure 234 is moved to a heating unit (e.g., oven, etc.) to remove liquid that was not removed by the number of squeegees.
  • a heating unit e.g., oven, etc.
  • the number of devices can be located at various points of the formation process of the nonwoven fibrous structure 234.
  • the heating unit can also be utilized for curing the ionic liquid material applied to the nonwoven fibrous structure 234.
  • the binder in the ionic liquid material is a thermosetting binder (e.g., a binder resin that hardens under heated conditions, etc.), wherein the binder and the ionic liquid of the ionic liquid material is cured with the heating unit.
  • the heating unit can be utilized to remove liquid (e.g., water) that exists on and/or within the nonwoven fibrous structure 234. As described herein, the heating unit can remove liquid that remains after a number of devices are utilized to remove liquid. Removing the liquid can produce an ionic reinforcement material at locations where the ionic liquid material was applied to the nonwoven fibrous structure 234.
  • the ionic liquid material can bond a portion of the population of fibers with an ionic reinforcement material.
  • the ionic reinforcement material is a residual material of the ionic liquid material (e.g., material remaining after liquid is removed from the ionic liquid material). That is, in some exemplary
  • the ionic reinforcement material is the residual of the ionic liquid material after the liquid (e.g., water, excess water) is removed from the nonwoven fibrous structure 234.
  • the ionic reinforcement material can provide an adhesive bond between the portion of the population of fibers when a binder is included in the ionic liquid material, as described herein.
  • the ionic reinforcement material can provide a number of characteristics to the nonwoven fibrous structure 234.
  • the ionic reinforcement material can provide the number of characteristics when the ionic reinforcement material includes the ionic liquid or the ionic liquid and binder mixture as described herein.
  • the number of characteristics can include a fire retardant characteristic, an antistatic characteristic, an antibacterial characteristic, an antimicrobial characteristic, an antifungal characteristic, or a combination thereof.
  • the ionic reinforcement material provides at least one of the number of characteristics.
  • the ionic reinforcement material provides a plurality of the number of characteristics as described herein.
  • the ionic reinforcement material can provide at least two of the number of characteristics listed herein.
  • the ionic reinforcement material is applied to the nonwoven fibrous structure 234 with an ionic liquid material comprising the ionic liquid choline dihydrogen phosphate and a thermosetting binder.
  • the nonwoven fibrous structure 234 is less brittle with the addition of the ionic liquid choline dihydrogen phosphate and thermosetting binder compared to a nonwoven fibrous structure 234 with only the addition of the thermosetting binder.
  • the nonwoven fibrous structure 234 comprises antistatic characteristics from the ionic reinforcement material.
  • the addition of the ionic liquid choline dihydrogen phosphate and thermosetting binder to the nonwoven fibrous structure 234 can provide additional fire retardant (e.g., flame retardant) characteristics to nonwoven fibrous structure 234.
  • the ionic reinforcement material can also add additional characteristics that can include: a fire retardant characteristic, an antistatic characteristic, an antibacterial characteristic, an antimicrobial characteristic, an antifungal characteristic, or a combination thereof.
  • the ionic reinforcement material can increase the elongation (e.g., plasticity or fluidity) of the nonwoven fibrous structure 234.
  • the ionic reinforcement material can also provide an increase in a tensile strength of the nonwoven fibrous structure 234.
  • the ionic reinforcement material can provide an increase in a tensile strength of the nonwoven fibrous structure 234 and an increase in elongation of the nonwoven fibrous structure 234.
  • the increase in tensile strength and the increase in elongation are in the machine direction (MD) of the nonwoven fibrous structure 234.
  • a nonwoven fibrous structure 234 (e.g., fibrous web, air-laid nonwoven fibrous web, etc.) according to the present disclosure can be formed utilizing a number of forming methods (e.g., melt-spinning, air-laying, spun-bonding, carding, etc.).
  • the nonwoven fibrous structure 234 is formed by air-laying fiber processing equipment, such as shown and described in U.S. Patent Nos. 7,491,354 and 6,808,664.
  • the air laying fiber processing equipment can use air flow to mix and inter-engage the fibers to form an air laid nonwoven fibrous structure. That is, the air laid nonwoven fibrous structure is formed by introducing a plurality of fibers into a forming chamber and dispersing the fibers within the forming chamber to form a population of individual fibers suspended in a gas, wherein the fibers are allowed to fall down to a collector.
  • the forming chamber can have spike rollers to blend and mix the fibers while gravity allows the fibers to fall down through the endless belt screen and form an air- laid nonwoven fibrous structure of inter-engaged fibers.
  • the fibers and the particulates are, in some exemplary embodiments, falling together to the bottom of the forming chamber to form the air-laid nonwoven fibrous structure .
  • a vacuum can be included below the area where the air-laid nonwoven fibrous structure forms in the forming chamber.
  • the nonwoven fibrous structure 234 is formed using a carding process.
  • An exemplary carding process is taught in, for example, U.S.
  • the nonwoven fibrous structure 234 is formed by a meltblowing process.
  • the meltblowing process is a method for forming a nonwoven fibrous structure by extruding a molten fiber- forming material through a plurality of orifices in a die to form fibers while contacting the fibers with air or other attenuating fluid to attenuate the fibers into fibers, and thereafter collecting the attenuated fibers.
  • An exemplary meltblowing process is taught in, for example, U.S. Patent No. 6,607,624.
  • the ionic liquid material can be applied to the nonwoven fibrous structure 234 at different stages of each of the forming methods.
  • the ionic liquid material can be applied to fibers and/or filaments during a formation (e.g., in a forming chamber, etc.) of the fibers and/or filaments utilizing a mist process to spray the fibers and/or filaments while they are being collected on a collector.
  • the ionic liquid material can be applied to the nonwoven fibrous structure 234 once the fibers and/or filaments are collected on a collector.
  • the ionic liquid material can be applied by known processing means such as roll coating, spray coating, and immersion coating and combinations of these coating techniques.
  • Nonwoven fibrous structures of the present disclosure and filter media including the same may, in some exemplary embodiments, advantageously incorporate a
  • biodegradable material e.g. polyhydroxy alkonates (PHA), polyhydroxybutyrates (PHB), and the like
  • PHA polyhydroxy alkonates
  • PHB polyhydroxybutyrates
  • Some filter media incorporating biodegradable material may, at the end of their useful life, be disposed of advantageously in municipal land-fills or industrial composting sites, thereby eliminating the need to return or otherwise recycle the spent filter media.
  • the basis weight of the nonwoven webs was measured with a Mettler Toledo XS4002S electronic balance.
  • IL denotes ionic liquid
  • PET denotes polyester
  • MD denotes machine direction
  • TD denotes transverse direction (relative to MD)
  • TS tensile strength
  • elong denotes percentage elongation
  • PEG polyethylene glycol
  • Std denotes a reference standard (i.e., a comparative example). Binders
  • this binder was coated on the nonwoven web by roll coating pre-diluted in the ratio of 2: 1 with H2O (33%> solids approx.). The binder was then cured in a through air oven at 140°C for approx. 4 minutes.
  • this binder was coated on the nonwoven web by roll coating pre-diluted in the ratio of 2: 1 with H2O. The binder was then cured in a through air oven at 130°C for approx. 4 minutes.
  • ionic liquids (IL) listed in Table III were added at 10%> w/v to the binder aqueous solutions. The ionic liquids were added in one part to the binder aqueous solution and stirred until fully dissolved. Table III: Ionic Liquids (IL)
  • Fiber prebonded webs were formed prior to coating of the resins.
  • the required ratio of fibers to melty fibers were weighed and mixed by passing through a fiber opener.
  • the air-laid prebonded webs were formed on a Rando Webber forming machine. Following forming of the web, it was sent through a through-air oven at 130°C to yield a lightly bonded web suitable for coating trials.
  • the prebonded webs were coated by passing through roll coating cylinders containing the binder/ionic liquid mixture in the reservoir.
  • Tables 1-4 show the Tensile Test results for nonwoven viscose prebond webs with Acrodur binder and with various ionic liquids.
  • Tables 5-8 show the Tensile Test results for nonwoven viscose prebond webs with OC Biobinder binder and various ionic liquids.
  • Tables 9-12 show the Tensile Test results for nonwoven viscose prebond webs with Acrodur binder and various ionic liquids.
  • Tables 13-16 show the Tensile Test results for nonwoven viscose prebond webs with OC Biobinder binder and various ionic liquids. Table 13
  • Tables 17-18 show the Tensile Test results for nonwoven viscose prebond webs with Primal B15 binder and various ionic liquids.
  • the surface resistivity of the nonwoven coated samples was carried out according to VDE 0303 part 30.
  • the test equipment consisted of a Teraohmmeter (PM 126 567), electrode (20 cm 2 ) and 0 Electrode (5 cm). The following terms are defined for the Surface Resistivity Test:
  • Tables 25-32 show the Surface Resistivity Test results for Example 1 with various ionic liquids.
  • Tables 33-43 show the Surface Resistivity Test results for Example 2 with various ionic liquids.
  • Tables 44-51 show the Surface Resistivity Test results for Example 3 with various ionic liquids.
  • Flame retardancy testing was carried out according to test method UL94 vertical burner test procedure with minor modifications. Methane gas at a pressure of 2.5 psi was used for the Bunsen burner. The flame cone height measurements were as follows: 1 cm for the interior and 2 cm for the exterior. The distance between the Bunsen tip and the end of the sample was 1 cm. The sample size was 15 x 2.5 cm. The sample measured consisted of a web of viscose fibers with the requisite binder containing 10% ionic liquid unless otherwise stated. 3 samples were measured for each binder/IL combination. When all 3 samples gave the same results, only 1 overall result is noted.
  • Tl Duration (seconds) of after flame after ignited Bunsen was applied to sample for 10 seconds
  • Table 52 shows the Flame Retardancy Test results for Example 2 with various binders and ionic liquids. Table 52
  • Table 53 summarizes overall performance properties with respect to Tensile Strength, Anti-static properties, and Flame Retardancy.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

L'invention concerne des structures fibreuses non tissées et des supports associés avec un matériau de renforcement ionique et des procédés de formation de ceux-ci, comprenant la liaison conjointe d'au moins une partie de la population de fibres à un matériau de renforcement ionique. Les structures fibreuses non tissées peuvent être utilisées sous forme de natte, de bande, de feuille, de canevas, ou d'une de leurs combinaisons. L'invention concerne également des procédés de fabrication de structures fibreuses non tissées et de supports associés avec un matériau de renforcement ionique fabriquées selon les procédés.
PCT/US2015/027869 2014-04-28 2015-04-28 Structures fibreuses non tissées comprenant un matériau de renforcement ionique, et procédés WO2015168049A1 (fr)

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EP15785829.1A EP3137667A4 (fr) 2014-04-28 2015-04-28 Structures fibreuses non tissées comprenant un matériau de renforcement ionique, et procédés
CN201580021758.6A CN106460271A (zh) 2014-04-28 2015-04-28 包括离子增强材料的非织造纤维结构及方法
US15/304,117 US20170037564A1 (en) 2014-04-28 2015-04-28 Nonwoven fibrous structures including ionic reinforcement material, and methods
KR1020167032845A KR20160146958A (ko) 2014-04-28 2015-04-28 이온성 보강 재료를 포함하는 부직 섬유질 구조물, 및 방법
JP2016564574A JP2017514035A (ja) 2014-04-28 2015-04-28 イオン補強材料を含む不織布繊維構造、及び方法

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DE102019108691A1 (de) * 2019-04-03 2020-10-08 Cerdia International GmbH Isoliermaterial, verfahren zur herstellung eines solchen isoliermaterials sowie verwendung eines solchen isoliermaterials
WO2020262231A1 (fr) * 2019-06-26 2020-12-30 パナソニックＩｐマネジメント株式会社 Matériau de filtration pour traitement de l'eau, dispositif de filtration pour traitement de l'eau mettant en œuvre ce matériau, et procédé de fabrication de ce matériau
CN112176527A (zh) * 2020-09-30 2021-01-05 福州大学 一种抗菌抗静电阻燃聚酯纤维梯度结构吸音材料及其制备方法

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JP2017514035A (ja) 2017-06-01
EP3137667A1 (fr) 2017-03-08

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